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contents features .............................................................. 1 pin assignment ................................................... 1 block diagram ..................................................... 2 instruction set ..................................................... 2 absolute maximum ratings ................................. 2 recommended operating conditions .................. 3 dc electrical characteristics ............................... 3 endurance ........................................................... 3 pin capacitance .................................................. 3 ac electrical characteristics ............................... 4 operation............................................................. 5 receiving a start-bit ............................................ 7 three-wire interface (di-do direct connection) ... 7 ordering information ........................................... 8 characteristics ..................................................... 9 dimensions .......................................................... 13 discontinued product
seiko instruments inc. 1 the s-29453a series is high speed, low power 8k-bit serial e2prom with a wide operating voltage range. it is organized as 512-word 16-bit. it is capable of sequential read, where addresses are automatically incremented in 16-bit blocks. the instruction code is compatible with the m6m800x1 series. ? ? package y 8-pin dip (pkg drawing code : dp008-a) y 8-pin sop ( pkg drawing code : fe008-a) ? ? pin assignment cs chip select input sk serial clock input di serial data input do serial data output gnd ground (0 v) vcc power supply test test pin (normally kept open) (can be connected to gnd or vcc) ? ? features low power consumption standby : 1 m a max. operating : 1.2 ma max. (v cc =5.5 v) 0.4 ma max. (v cc =2.5 v) wide operating voltage range write : 2.5 to 5.5 v read : 1.8 to 5.5 v sequential read capable endurance : 10 5 cycles/word data retention : 10 years nc vcc 8-pin sop top view vcc do nc test sk di gnd cs 8-pin dip top view 1 2 3 4 5 6 7 8 test gnd do di cs sk 6 5 8 7 3 4 1 2 figure 1 cmos serial e 2 prom s-29453a rev.1.11 discontinued product
cmos serial e 2 prom s-29453a 2 seiko instruments inc. block diagram instruction set table 1 instruction operation block address data read (read data) 1010100a 8 a 7 to a 0 d 15 to d 0 output * program (write data) 1010010a 8 a 7 to a 0 d 15 to d 0 ewen (program enable) 10100011 xxxxxxxx ewds (program disable) 10100000 xxxxxxxx x : doesnt matter. * : when 16-bit data of the specified address is output, the data of the next address is output. absolute maximum ratings table 2 parameter symbol ratings unit power supply voltage v cc -0.3 to +7.0 v input voltage v in -0.3 to v cc +0.3 v output voltage v out -0.3 to v cc v storage temperature under bias t bias -50 to +95 c storage temperature t stg -65 to +150 c fi g ure 2 memory array data register address decoder mode decode logic clock generator output buffer v cc gnd do di cs sk discontinued product
cmos serial e 2 prom s-29453a seiko instruments inc. 3 recommended operating conditions table 3 parameter symbol conditions min. typ. max. unit power supply voltage v cc read operation write operation 1.8 2.5 5.5 5.5 v v high level input voltage v ih v cc =2.5 to 5.5v v cc =1.8 to 2.5v 0.8 v cc 0.8 v cc v cc v cc v v low level input voltage v il v cc =2.5 to 5.5v v cc =1.8 to 2.5v 0.0 0.0 0.2 v cc 0.15 v cc v v operating temperature t opr -40 +85 c dc electrical characteristics endurance table 6 parameter symbol min. typ. max. unit endurance n w 10 5 cycles/word pin capacitance table 7 (ta=25 c, f=1.0 mhz, v cc =5 v) parameter symbol conditions min. typ. max. unit input capacitance c in v in =0 v 8pf output capacitance c out v out =0 v 10 pf v cc =5.0 v 10 % v cc =2.5 to 3.3 v v cc =1.8 to 2.5 v min. typ. max. min. typ. max. min. typ. max. current consumption (read) i cc1 do unloaded 1.2 0.5 0.4 ma current consumption (program) i cc2 do unloaded 5.0 2.0 ma v cc =5.0 v 10 % v cc =2.5 to 4.5 v v cc =1.8 to 2.5 v min. typ. max. min. typ. max. min. typ. max. standby current consumption i sb input: v cc or gnd 1.0 1.0 1.0 a input leakage current i li v in =gnd to v cc 0.1 1.0 0.1 1.0 0.1 1.0 a output leakage current i lo v out =gnd to v cc 0.1 1.0 0.1 1.0 0.1 1.0 a cmos i ol =100 a 0.1 0.1 0.1 v ttl i ol =2.1 ma 0.45 v cmos v cc =2.5 to 5.5 v : i oh =-100 a v cc =1.8 to 2.5 v : i oh =-10 a v cc - 0.7 v cc - 0.7 v cc - 0.3 v ttl, i oh =-400 a 2.4 v write enable latch data hold voltage v dh 1.5 1.5 1.5 v table 4 low level output voltage v ol high level output voltage v oh parameter parameter symbol symbol unit unit conditions conditions discontinued product
cmos serial e 2 prom s-29453a 4 seiko instruments inc. ac electrical characteristics table 8 measuring conditions input pulse voltage 0.1 v cc to 0.9 v cc output reference voltage 0.5 v cc output load 100pf read/write operations read operation parameter symbol v cc =5.0 v 10 % v cc =2.5 to 4.5 v v cc =1.8 to 2.5 v unit min. typ. max. min. typ. max. min. typ. max. cs setup time t css 0.2 0.4 1.0 s cs hold time t csh 0.2 0.4 1.0 s cs setup time (cpu) t css (cpu) 0.2 0.4 1.0 s cs hold time (cpu) t csh (cpu) 0.2 0.4 1.0 s cs deselect time t cds 0.2 0.2 0.4 s data setup time t ds 0.2 0.4 0.8 s data hold time t dh 0.2 0.4 0.8 s 1 data output delay time t pd1 0.4 0.8 -- 2.0 s 0 data output delay time t pd0 0.4 0.8 -- 2.0 s clock frequency f sk 0.0 2.0 0.0 0.5 0.0 0.2 mhz clock pulse width t skh, t skl 0.25 1.0 2.5 s output disable time t hz1 , t hz2 0 50 150 0 500 1000 ns output enable time t sv 0 50 150 0 500 1000 ns programming time t pr 4.0 10 4.0 10 ms table 9 valid data valid data t skh t skl t csh t cds t pd0 t pd1 t css t ds di sk do cs t dh t csh ( cpu ) t css ( cpu ) sk cs figure 3 timing chart input data is retrieved on the rising edge of sk. output data is triggered on the falling edge of sk. fi g ure 4 timin g chart for t css ( cpu ) and t csh ( cpu ) when cpu is connected discontinued product
cmos serial e 2 prom s-29453a seiko instruments inc. 5 operation a 2 a 8 12 34 14 d 15 d 15 d 14 d 14 d 13 d 14 hi - z a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 +1 d 13 d 0 d 1 d 2 d 15 hi-z a 3 a 4 a 5 a 6 a 7 0 1 33 32 31 30 29 11 10 9 8 7 6 5 4 3 2 1 a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 +2 d 13 d 0 d 1 d 2 13 cs sk di do 16 15 a 1 a 0 0 1 0 1 0 instructions (in the order of operation code, address, and data) are latched to di in synchronization with the rising edge of sk after cs goes low. a start-bit can only be recognized when the high of di is latched at the rising edge of sk after changing cs to low, it is impossible for it to be recognized as long as di is low, even if there are sk pulses after cs goes low. instruction finishes when cs goes high, where it must be high between commands during t cds . all input, including di and sk signals, is ignored while cs is high. the operation code plus address is a multiple of 8- bits. this makes it easy to prepare your own software using a serial interface incorporated into the cpu. 1. read the read instruction reads data from a specified address. the read operation code and address are continuously latched in synchronization with the rising edge of sk. the do pin begins to output at the 16-th clock from a start-bit. data is continuously output in synchronization with the falling edge of sk. when all of the data (d 15 to d 0 ) in the specified address has been read, data in the next address can be read with the input of another sk clock. thus, the data over whole area of the memory can be read by continuously inputting sk clocks as long as cs is low. the last address (an a1 a0 = 1 11) rolls over to the top address (an a1 a0 = 0 00). figure 5 read timing discontinued product
cmos serial e 2 prom s-29453a 6 seiko instruments inc. 2. program 10 13 16 11 12 14 15 17 987654321 3231 1 0 1 0 0 1 0 a8 a7 a6 a5 a4 a3 a2 a1 a0 d1 d0 t hz1 cs sk do di d15 t sv t pr ready busy t cds hi-z 3. write enable (ewen) and write disable (ewds) the ewen instruction puts the s-29453a into write enable mode, which accepts program instruction. the ewds instruction puts the s-29453a into write disable mode, which refuses program instruction. the s-29453a powers on in write disable mode, which protects data against unexpected, erroneous write operations caused by noise and/or cpu malfunctions. it should be kept in write disable mode except when performing write operations. figure 6 program timing the program instruction writes 16-bit data to a specified address. after changing cs to low, input program operation code, address, and 16-bit data. if there is a data overflow of more than 16 bits, only the last 16-bits of the data is considered valid. changing cs to high will start the program operation. it is not necessary to make the data "1" before initiating the program operation. the write operation is completed in 10 ms (t pr max.), and the typical write period is less than 5 ms. in the s-29453a, it is easy to verify the completion of the write operation in order to minimize the write cycle by setting cs to l and checking the do pin after the write operation begins by setting cs to h verify operations to detect changes in the do output can be executed in succession. one is a change from l to h with cs=l the other is a change from l to h after setting cs to l and returning cs to h repeatedly. because all sk and di inputs are ignored during the write operation, any input of instruction will also be disregarded. when do outputs high after completion of the write operation or if it is in the high-impedence state (hi-z), the input of instructions is available. even if the do pin remains high, it will enter the high-impedence state upon the recognition of a high of di attached to the rising edge of an sk pulse. figure 7 ewen/ewds timing 10 13 16 11 12 14 15 987654321 10 1000 cs sk do di hi-z 11= 00 ewen ewds 8xs discontinued product
cmos serial e 2 prom s-29453a seiko instruments inc. 7 ? ? receiving a start-bit ? ? three-wire interface (di-do direct connection) please refer application note s-29 & s-93c series eeproms tips, tricks & traps for equivalent circuit of each pin. a start-bit can be recognized by latching the high level of di at the rising edge of sk after changing cs to low. the write operation begins by inputting the write instruction and setting cs to high. the do pin then outputs low during the write operation and high at its completion by setting cs to low (verify operation). therefore, only after a write operation, in order to accept the next command by having cs go low, the do pin is switched from a state of high- impedence to a state of data output; but if it recognizes a start-bit, the do pin returns to a state of high-impedence (see figure 8). make sure that data output from the cpu does not interfere with the data output from the serial memory ic when you configure a 3-wire interface by connecting di input pin and do output pin. such interference may cause a start- bit fetch problem. figure 8 start-bit latching timing hi-z t hz2 sk di c cs do figure 9 3-wire interface di sio do cpu s-29453a r=10~ 100 k w although the normal configuration of a serial interface is a 4-wire interface to cs, sk, di, and do, a 3-wire interface is also a possibility by connecting di and do. however, since there is a possibility that the do output from the serial memory ic will interfere with the data output from the cpu with a 3-wire interface, install a resistor between di and do in order to give preference to data output from the cpu to di(see figure 9). discontinued product
cmos serial e 2 prom s-29453a 8 seiko instruments inc. ordering information s-29453a xx package dp : dip fe : sop discontinued product
cmos serial e 2 prom s-29453a seiko instruments inc. 9 characteristics 1. dc characteristics 85 ta ( c) 10k 100k f sk (hz) 1m 2m i cc1 (ma) 1.0 0.5 0 i cc1 (ma) 1.0 0.5 0 234567 v cc (v) ta=25 c f sk =1 mhz data=0101 v cc =5.0v ta=25 c 40 0 i cc1 (ma) 1.0 0.5 0 v cc =5.5v f sk =2 mhz data=0101 85 ta ( c) 40 0 i cc1 (ma) 1.0 0.5 0 v cc =3.3v f sk =1mhz data=0101 85 ta ( c) i sb (a) 10 - 6 10 - 10 i cc2 (ma) 4.0 2.0 0 234567 v cc (v) ta=25 c data 00000000 v cc =5.5v 40 0 i cc2 (ma) 4.0 2.0 0 v cc =5.5v data 00000000 85 ta ( c) 40 0 i cc2 (ma) 4.0 2.0 0 v cc =3.3v data 00000000 10 - 7 10 - 8 10 - 9 10 - 11 85 ta ( c) 40 0 1.1 current consumption (read) i cc1 - ambient temperature ta 1.2 current consumption (read) i cc1 - ambient temperature ta 1.3 current consumption (read) i cc1 - power supply voltage v cc 1.4 current consumption (read) i cc1 - clock frequency f sk 1.5 current consumption (program) i cc2 - ambient temperature ta 1.6 current consumption (program) i cc2 - ambient temperature ta 1.7 current consumption (program) i cc2 - power supply voltage v cc 1.8 standby current consumption i sb -- ambient temperature ta discontinued product
cmos serial e 2 prom s-29453a 10 seiko instruments inc. 85 ta ( c) i lo ( a) 1.0 0.5 0 i lo ( a) 1.0 0.5 0 40 0 i li ( a) 1.0 0.5 0 v cc =5.5v cs, sk, di, test=0v 85 ta ( c) 40 0 i li ( a) 1.0 0.5 0 v cc =5.5v cs, sk, di, test=5.5v 85 ta ( c) 40 0 v cc =5.5v do=0v 85 ta ( c) 40 0 v cc =5.5v do=5.5v 85 ta ( c) 40 0 v oh (v) 4.4 4.2 v cc =4.5v i oh =-400 a 4.6 85 ta ( c) 40 0 v oh (v) 2.5 v cc =2.7v i oh =-100 a 2.7 85 ta ( c) 40 0 v ol (v) 0.2 0.1 v cc =4.5v i ol =2.1ma 0.3 85 ta ( c) 40 0 v ol (v) 0.02 0.01 v cc =1.8v i ol =100 a 0.03 2.6 1.9 input leakage current i li - ambient temperature ta 1.10 input leakage current i li - ambient temperature ta 1.11 output leakage current i lo - ambient temperature ta 1.12 output leakage current i lo - ambient temperature ta 1.13 high level output voltage v oh - ambient temperature ta 1.14 high level output voltage v oh - ambient temperature ta 1.15 low level output voltage v ol - ambient temperature ta 1.16 low level output voltage v ol - ambient temperature ta discontinued product
cmos serial e 2 prom s-29453a seiko instruments inc. 11 i oh (ma) -10.0 -5.0 0 85 ta ( c) 40 0 v cc =4.5v v oh =2.4v i oh (ma) -4 -2 0 85 ta ( c) 40 0 v cc =2.7v v oh =2.0v i ol (ma) 20 10 0 85 ta ( c) 40 0 v cc =4.5v v ol =0.45v i ol (ma) 1.0 0.5 0 85 ta ( c) 40 0 v cc =1.8v v ol =0.1v v inv (v) 3.0 1.5 0 1 v cc (v) ta=25 c cs, sk, di 234567 v inv (v) 3.0 2.0 0 85 40 0 v cc =5.0v cs, sk, di ta ( c) 1.17 high level output current i oh - ambient temperature ta 1.18 high level output current i oh - ambient temperature ta 1.19 low level output current i ol - ambient temperature ta 1.20 low level output current i ol - ambient temperature ta 1.21 input inversion voltage v inv - power supply voltage v cc 1.22 input inversion voltage v inv - ambient temperature ta discontinued product
cmos serial e 2 prom s-29453a 12 seiko instruments inc. 2. ac characteristics t pr (ms) 4 2 234567 v cc (v) ta=25 c 1 85 ta ( c) 40 0 t pr (ms) 4 2 v cc =5.0v 6 85 ta ( c) 40 0 t pr (ms) 4 2 v cc =3.0v 6 85 ta ( c) 40 0 t pd1 ( s) 0.2 0.1 0.3 85 ta ( c) 40 0 t pd1 ( s) 0.4 0.2 0.6 v cc =4.5v data"0" "1" v cc =2.7v data"0" "1" 85 ta ( c) 40 0 t pd0 ( s) 0.2 0.1 0.3 85 ta ( c) 40 0 t pd0 ( s) 0.4 0.2 0.6 v cc =4.5v data"1" "0" v cc =2.7v data"1" "0" 10k 100k 1m 2m 2345 1 ta=25 c f max (hz) v cc (v) 2.1 maximum operating frequency f max - power suppl y volta g e v cc 2.2 program time t pr - power supply voltage v cc 2.3 program time t pr - ambient temperature ta 2.4 program time t pr - ambient temperature ta 2.5 "1" data output delay time t pd1 - ambient temperature ta 2.6 " 1 " data output delay time t pd1 - ambient temperature ta 2.7 0 data output delay time t pd0 - ambient temperature ta 2.8 "0" data output delay time t pd0 - ambient temperature ta discontinued product

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the information described herein is subject to change without notice. seiko instruments inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. when the products described herein are regulated products subject to the wassenaar arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. use of the information described herein for other purposes and/or reproduction or copying without the express permission of seiko instruments inc. is strictly prohibited. the products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of seiko instruments inc. although seiko instruments inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. discontinued product

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