memory

AT7456E

Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the AT7456E family does

The AT7456E is a single-channel, monochrome on-screen display generator integrating a video driver, sync separator, and EEPROM. It supports 512 user-defined characters in 12x18 pixel format with brightness control and operates across commercial and industrial temperature ranges from -40°C to +85°C. The device accepts 3.15V to 5.25V supplies, draws 2.0mA analog current, and features a 6MHz large-signal bandwidth. It displays up to 16 lines by 30 columns and is typically used in security monitoring systems, industrial cameras, and handheld measurement instruments.

Next step
Start building with AT7456E → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.
01 — Key specifications

AT7456E datasheet parameters

ParameterMinTypMaxConditionsSource
quiescent current 2 mA 2.2 mA 2.5 mA VIN = 1VP-P(100% white flat field signal), VOUT load, RL = 150Ω; POWER SUPPLIES Zhongkewei datasheet, p. 2 — 电特性参数：
output voltage 2.4 V 2.66 V — Figures 1a, 1b; VIDEO CHARACTERISTICS Zhongkewei datasheet, p. 3 — 杭州中科微电子有限公司
output current — 200 mA 230 mA VOUT to PGND; VIDEO CHARACTERISTICS Zhongkewei datasheet, p. 3 — 杭州中科微电子有限公司
supply voltage range 3.15 V 5 V 5.25 V POWER SUPPLIES Zhongkewei datasheet, p. 2 — 电特性参数：
operating temperature -40 °C — 85 °C Zhongkewei datasheet, p. 2
clock frequency — 27 MHz — CLOCK INPUT (CLKIN) Zhongkewei datasheet, p. 2 — 电特性参数：
input capacitance — 5 pF — DIGITAL INPUTS (\overline{CS}, SDIN, \overline{RESET}, SCLK) Zhongkewei datasheet, p. 2 — 电特性参数：
psrr — 30 dB — VAVDD = VDVDD = VPVDD = 5V; VIN = 1VP-P, measured at VOUT; f = 5MHz; power-supply ripple = 0.2VP-P; VIDEO CHARACTERISTICS Zhongkewei datasheet, p. 3 — 杭州中科微电子有限公司
rise time — 68 ns — OSD insertion mux register OSDM[5, 4, 3] = 011b; OSD CHARACTERISTICS Zhongkewei datasheet, p. 3 — 杭州中科微电子有限公司
fall time — 3.6 ns — 5pF and 10kΩto DGND; CLOCK OUTPUT (CLKOUT) Zhongkewei datasheet, p. 3 — 杭州中科微电子有限公司
memory size — 262 kbit — Character memory: 480 rows x 64-byte NVM + 32 rows x 64-byte SRAM (512 x 64 bytes = 32768 bytes) Zhongkewei datasheet, p. 15
data retention — 100 year — TA = +25°C; NONVOLATILE MEMORY Zhongkewei datasheet, p. 2 — 电特性参数：
program erase cycles — 100 kcycle — TA = +25°C, Endurance (Stores) Zhongkewei datasheet, p. 2 — 电特性参数：
page program time — 5 ms — NVM write, CMM = 0xa0 (write character library), typical Zhongkewei datasheet, p. 36 — 各操作命令的实际执行时间对照表
output voltage high 2.4 V 4.88 V — ISOURCE = 4mA (SDOUT, CLKOUT); DIGITAL OUTPUTS (SDOUT, CLKOUT, \overline{HSYNC}, \overline{VSYNC}, LOS) Zhongkewei datasheet, p. 2 — 电特性参数：
output voltage low — 160 mV 450 mV ISINK = 4mA; DIGITAL OUTPUTS (SDOUT, CLKOUT, \overline{HSYNC}, \overline{VSYNC}, LOS) Zhongkewei datasheet, p. 2 — 电特性参数：
settling time — 32 s — video; VIDEO CHARACTERISTICS Zhongkewei datasheet, p. 3 — 杭州中科微电子有限公司
03 — Alternatives

Closest matches to AT7456E

SST26VF064B 6.2× higher rise time, 3.3× lower page program time, 1.7× lower supply voltage range
M24C64-DF 4.1× lower memory size, 2.0× higher data retention, 1.2× higher output voltage low
GD25Q128EBIG 10.0× lower page program time, 5.0× lower data retention, 4.9× higher clock frequency
GD25Q16E 12.5× lower page program time, 5.0× lower data retention, 4.9× higher clock frequency
GD25Q16EEEG 12.5× lower page program time, 5.0× lower data retention, 4.9× higher clock frequency
GD25Q32EBIG 10.0× lower page program time, 5.0× lower data retention, 4.9× higher clock frequency
GD25Q64EBIG 10.0× lower page program time, 5.0× lower data retention, 4.9× higher clock frequency
GD25WD05CEIG 5.0× lower data retention, 3.7× higher clock frequency, 3.1× lower page program time
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